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3.
A women who has passed her prime
"Hey John, is your new secratary hot?"

"No, she is a little long in the tooth."
by John McDonough November 18, 2003
84 101
 
1.
(adj.) Old, outdated. no longer to perform its primary function at optimum level.
The playstation one is a bit long in the tooth these days.
by Kung-Fu Jesus June 07, 2004
181 67
 
2.
old, advanced in age(from the practice of judging a horse's age by the length of it's teeth)
The plumbing is a bit long in the tooth. It needs to be replaced.
by The Return of Light Joker January 21, 2010
89 34